Molding apparatus



W. H. HSHER.

MOLDING APPARATUS. APPLICATION man was, 1920.

Patented Jan. 25, 1921.

3 SHEETS-SHEET 1 mas/70R, Vim: Hfisher I." g g ATTORNEY- W. H. FISHER. MOLDING APPARATUS. APPLiCATION FILED APR.8, 1920.

Patented Jan. 25,- 1921.

3 SHEETS-SHEET 2- 4 Arm/Mr.

W. H. FISHER. MOLDING APPARATUS. APPUCATIQN FILED APR. 8. 1920. 1,366,373. Patented Jan. 25,1921.

3 SHEETS-SHEET 3,

WILLIS HERMAN FISHER, OF WEST PATERSON, NEW JERSEY.

I MOLDING APPARATUS.

Specification of Letters Patent.

Patented Jan. 25, 1921.

Application filed April 8, 1920. Serial No. 372,159.

T all whom it may concern:

Be it known that V 1, rims HERMAN FISHER, a citizen of the United States, residing at WVest Paterson, in the county of Passaic' and State of New Jersey, have invented certain new and useful Improvements in Molding Apparatus, of which the following is aspecification.

. This invention relates to apparatus for molding blocks of plastic material, as concrete, in which there is a vertically acting ram and above the ram a fixed head, thus forming. a press, and in which also there is a rotary carrier journaled on a vertical axis and having arranged to slide vertically'thereon, being set at regular intervals, aseries of mold boxes open at the top, the carrier having manually released means to hold it stationary .where each mold box comes to a position between the members of the press, so that when the ram of the press works it shifts the mold box vertically in the carrier and brings its open top into telescopic relation to the fixed head, thus to subject the contents of the box to pressure; each box has sides which swing open laterally on vertical axes atthe back and a bottom and front wall structure which swings forward to deliver the molded block on a horizontal axis, and it also has means to lock the sides and said structure in the molding position.

My present invention consists in improvements in the mold box and also in the manually releasable means to hold the carrier at each stage where the press operates, said improvements; being designed to increase the efficiency of the apparatus and strengthen the several parts of the mold box.

In the drawings, Figure 1 is a side view of the improved apparatus, and Fig. 1 a detail thereof;

Figs. 2, 3, 45 and 5 top, side, front and underneath views of one of the boxes;

Fig. 6 ,a vertical sectional view of the box;

Fig. 7 an elevation and vertical section of the back wall of a box and Fig. 8 aplan thereof;

Fig. 9 anelevation and vertical section of the front wall of the box, and Fig. 10 a plan thereof (certain bars a appearing in dotted outline) 5 Fig. 11 an elevation of a side wall;

Fig. 12 shows a two part pattern plate;

Fig. 13 one of the side bars;

Fig. 14 one of the lock-bars; and

Fig. 15 a certain knife or separator plate.

In frame a on a vertical axis 12 rotates the carrier 0 having at intervals guides d on which the moldboxes slide vertically. The carrier is provided at regular intervals with inside notches e. Pivoted in the frameis a holding pawl g substantially J-shaped,

7 its longer, arm bearing against the inside surfaces of the carrier and as the carrier rotates being adapted to enter the first approached 'notch and so hold the carrier against further rotation until the latch is removed from the notch. A lever h is fulcrumed in the frame under the carrier and projects across the same from the latch with which it is connected by a pin 2' engaged in a cam slot j in the short arm of the latch.

The free. arm of the lever, which is the heavier, has a handle 72. The lever normally holds the latch bearing against the inner periphery of the carrier; but the operator by-raising the lever may clear the latch from the notch to permit rotation of the carrier. A and B are the aforesaid fixed head and movable member of the ram.

The back wall Z of each mold box has horizontal strengthening ribs m (apertured at n to receive guides (l) and its end edges beveled forwardly at 0. The rear inturned ends of bars 1) of the sidewalls g are pivoted to the ends of ribs m, which side walls have inside face plates 0* which can assume abutting contact with the ends of the rear wall (Fig. 2) and thus form square corners on the finished block, edges 0- cutting through any material that might interpose itself and prevent full closing of the sid walls.

The side bars 8, having pivot holes t at their free ends, have bent off-securing portions at at their rear ends, the end of each such portion having an upstanding extension '1) and being secured by screw bolts to the back of back wall Z. These side bars. which project forwardly of the back wall, carry the pivoted structure which-includes the front and bottom of the box, and by forming them as described, particularly with the extensions '0, the strain they exert on the rear lower corners of the back wall is distributed, preventingthe breaking away of said corners.

The front wall 10 has at the inside a ledge or along its lower edge and also horizontal reinforcing ribs 3 at the outside; to these latter are fixed bars 2 which at both ends project and are notched and adapted tofit in apertures 2 formed in the forward projecting ends of the side-wall bars 7). These bars a form a reinforce to the front wall and also a part of the means to lock the side walls to the front wall, so they are preferably made of steel. Against the under fiat face of the front wall is secured the plate 3 which is slit, as at 4:, at suitable intervals and on which are removably secured plates 5 5 of such relative sizes as to bring the space 6 between them in registry with one or the other of the slits l, theseplates being formed with some suitable pattern (as ribs 7) to be provided in a face of the blocks to be molded and formed so as to rest on ledgelugs 9which are formed on the'back wall Z. The structure formed by the front wall to and the bottom-forming plates 3 and 5 5 is pivoted on a bolt 10 set in the pivot holes 25 of side bars 8. A pallet 11, on which in the outward position of said structure the,

molded block rests, may be placed against the inside of the frontwall, whose ends are cutaway, at 12, to enable theworkman to lift the pallet with the block thereon.

A knife 13 is adapted to be inserted in the space 6, being held by friction against falling through.

To hold the side walls in their inward position when the box is ready to receive a charge each has a lock bar le which is slidable vertically in suitable holes in the forward projecting ends of the bars p of the side walls and is notched at 15 to clear the ends of the steel bars 2 until the side walls are fully home, when the lock bars may be depressed to engage in the notches of bars and thus interlock therewith. The lock bars are raised and lowered by levers 16 pivoted to them and to the side walls.

en a box is charged the knife is placed in any one of the slits 6, according to the relative sizes wanted for the two blocks that are to be formed; it is held only by friction with the pallet and back wall. When the box, having been brought by rotating the carrier to place between the ram and head, is raised and its contents thus brought against the head the knif is depressed somewhat. On now lowering the box'to'the carrier and turning the carrier to bring the box to unloading position, and thereupon unlocking and swinging open the sides and front-and-bottom forming, structure the blocks-will rest on the pallet by and on which they may be removed for curing.

Before the pallet is removed the knife is pushed, from the front, clear of the molded blocks, the latter being then abutted or backed by the plates 5 5. lVhile the knife, being yieldably supported in the box, allows the press to compress the material to the required thickness, it also makes it possible to produce blocks with all the corners intact, which is impossible wherefixed divisional walls are used due to the tendency of the material to stick in the corners next to the divisional wall when, as in such a case is necessary, the molded blocks are removed from the walls, instead of vice versa.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. A mold-box having one wall thereof pivoted on an axis parallel with the plane of another wall thereof and movable to abut at its inner face one end of the latter wall, said end being beveled toward the plane of the inner face of said other wall. 7 7

2. A mold-box including an uprightback wall, side bars projecting forward from the bottom part ofthe back wall, and afrontand-bottom. forming structure pivoted in said side bars, said side bars having rear integralportions bent around back of and secured to the back wall, the rear end of each such portion having an upstanding extensionbearing against said back wall.

3. A molding apparatus including, with suitable supporting means and opposed pressure means therein, a mold box arranged betvveen said pressure means and open at the side toward one of them, said box having at its opposite side a slitted wall, in combination with a contents-dividing member arranged in the box with one edge in registry with the slit in said Wall and free to be moved by the first-named pressure means through the slit on a pressure operation of the pressure means. e

4. A molding apparatus including, with suitable supporting means and opposed pressure means therein, a mold box arranged between said pressure means and open at the side toward one of them, said box having at its opposite side a slitted wall, in comblnation with pattern-forming plates arranged against the inner face of said wall with a space between them registering with the slit therein and a contents-dividingmember arranged in the box with one edge in registry 5. In combination, aback wall, side mem- 25 bers projecting rigidly and forwardly therefrom, a front-and-bottom forming structure pivoted on a horizontal axis to said members, sides each pivoted on a vertical axis to the back wall, said structure having opposite notched lateral projections and the sides having apertures to receive said projections when said structure and sides are in closed position, and a look slidable reotilinearly vertically in eaoh'of said sides into and out of locking engagement with the notch of the corresponding projection.

6. A mold-box having a pivoted structure forming the front wall and bottom thereof, the axis of pivoting said structure being parallel with the planes of said walls, and a palletbearing flat against the inner face of the front wall, said front wall having hand recesses formed in the opposite lateral edges thereof exposing the corresponding edge portions of the pallet.

7 A mold box having a pivoted structure forming a front Wall and bottom wall, said front Wall having a horizontal ledge at its inner face and the bottom wall being rigidly secured to the front wall at right angles thereto and parallel with the ledge, in combination with a pallet resting against said face of the front wall edgewise upon said ledge.

In testimony whereof I affix my signature.

WVILLIS HERMAN FISHER. 

